Submission #991536

#	Time	Username	Problem	Language	Result	Execution time	Memory
991536		Sharky	Broken Device (JOI17_broken_device)	C++17	41 / 100	42 ms	2908 KiB

Anna

#include "Annalib.h"
#include <bits/stdc++.h>
using namespace std;

namespace anna {
const long long purple = 694202512019219198LL;
const int amogus = 696969;

mt19937 rng(amogus);
vector<int> p(151), inv(151);

int rnd(int u, int v) {
    return uniform_int_distribution<int> (u, v) (rng);
}

void gen_perm() {
    for (int i = 0; i < 150; i++) p[i] = i;
    for (int i = 0; i < 150; i++) swap(p[rnd(0, 149)], p[rnd(0, 149)]);
    for (int i = 0; i < 150; i++) inv[p[i]] = i;
}
}

using namespace anna;

// p = 3 1 2 4 0
// inv[3] = 0;
// inv[1] = 1;
// inv[2] = 2;
// inv[4] = 3;
// inv[0] = 4;

// inv = {4, 1, 2, 0, 3};

// say P = {4}
// new P = {0}

// 0: 1
// 1: 2
// 01: 3
// 11: 4

void Anna(int N, long long _X, int K, int P[]){
    long long X = _X;
    gen_perm();
    X ^= purple;
    // cout << X << '\n';
    vector<int> bit, seq(N, 0), li;
    for (int i = 59; i >= 0; i--) bit.push_back((X & (1LL << i)) ? 1 : 0);
    // for (int i = 0; i < 60; i++) cout << bit[i];
    // cout << '\n';
    li.push_back(-1);
    vector<int> pp(K, 0);
    for (int i = 0; i < K; i++) {
        pp[i] = p[P[i]];
        li.push_back(pp[i]);
    };
    li.push_back(N);
    sort(li.begin(), li.end());
    int cur = 0;
    int ptr = 0;
    for (int i = 1; i < li.size(); i++) {
        int l = li[i - 1] + 1, r = li[i] - 1;
        if (l > r) continue;
        // cout << l << ' ' << r << '\n';
        ptr = l;
        int dist = r - l + 1;
        while (true) {
            if (cur < 59 && bit[cur] == 1 && bit[cur + 1] == 1 && dist >= 2) {
                dist -= 2;
                cur += 2;
                seq[ptr] = seq[ptr + 1] = 1;
                ptr += 2;
            } else if (cur < 59 && bit[cur] == 0 && bit[cur + 1] == 1 && dist >= 1) {
                dist -= 1;
                cur += 2;
                seq[ptr] = 1;
                ptr += 1;
            } else if (cur < 59 && bit[cur] == 1 && bit[cur + 1] == 0 && dist >= 3) {
                dist -= 3;
                cur += 2;
                seq[ptr] = seq[ptr + 1] = seq[ptr + 2] = 1;
                ptr += 3;
            } else if (cur < 59 && bit[cur] == 0 && bit[cur + 1] == 0 && dist >= 4) {
                dist -= 4;
                cur += 2;
                seq[ptr] = seq[ptr + 1] = seq[ptr + 2] = seq[ptr + 3] = 1;
                ptr += 4;
            } else break;
            if (ptr <= r) seq[ptr++] = 0, dist--;
        }
        while (ptr <= r) seq[ptr++] = 0;
    }
    // for (int i = 0; i < N; i++) cout << seq[i] << ' ';
    // cout << '\n';
    vector<int> vt;
    for (int i = 0; i < N; i++) {
        // if (seq[i]) cout << inv[i] << ' ';
        Set(inv[i], seq[i]);
    }
    // cout << '\n';
}

Bruno

#include "Brunolib.h"
#include <bits/stdc++.h>
using namespace std;

namespace bruno {
const long long purple = 694202512019219198LL;
const int amogus = 696969;

mt19937 rng(amogus);
vector<int> p(151), inv(151);

int rnd(int u, int v) {
    return uniform_int_distribution<int> (u, v) (rng);
}

void gen_perm() {
    for (int i = 0; i < 150; i++) p[i] = i;
    for (int i = 0; i < 150; i++) swap(p[rnd(0, 149)], p[rnd(0, 149)]);
    for (int i = 0; i < 150; i++) inv[p[i]] = i;
}
}

using namespace bruno;

// 0: 1
// 1: 2
// 01: 3
// 11: 4

long long Bruno(int N, int A[]) {
    gen_perm();
    vector<int> bits;
    long long X = 0;
    vector<int> a(N), z, g;
    for (int i = 0; i < N; i++) {
        a[i] = A[inv[i]];
        // if (a[i]) cout << inv[i] << ' ';
    }
    // cout << '\n';
    // for (int i = 0; i < N; i++) cout << a[i] << ' ';
    // cout << '\n';
    z.push_back(-1);
    for (int i = 0; i < N; i++) if (!a[i]) z.push_back(i);
    z.push_back(N);
    for (int i = 1; i < z.size(); i++) g.push_back(z[i] - z[i - 1] - 1);
    for (int i = 0; i < g.size(); i++) {
        if (g[i] == 4) {
            bits.push_back(0);
            bits.push_back(0);
        } else if (g[i] == 3) {
            bits.push_back(1);
            bits.push_back(0);
        } else if (g[i] == 2) {
            bits.push_back(1);
            bits.push_back(1);
        } else if (g[i] == 1) {
            bits.push_back(0);
            bits.push_back(1);
        }
    }
    for (int i = 0; i < bits.size(); i++) {
        X *= 2LL;
        X += bits[i];
        // cout << bits[i];
    }
    // cout << '\n';
    // cout << X << '\n';
    X ^= purple;
    return X;
}

Compilation message (stderr)

Anna.cpp: In function 'void Anna(int, long long int, int, int*)':
Anna.cpp:61:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |     for (int i = 1; i < li.size(); i++) {
      |                     ~~^~~~~~~~~~~

Bruno.cpp: In function 'long long int Bruno(int, int*)':
Bruno.cpp:45:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for (int i = 1; i < z.size(); i++) g.push_back(z[i] - z[i - 1] - 1);
      |                     ~~^~~~~~~~~~
Bruno.cpp:46:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |     for (int i = 0; i < g.size(); i++) {
      |                     ~~^~~~~~~~~~
Bruno.cpp:61:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |     for (int i = 0; i < bits.size(); i++) {
      |                     ~~^~~~~~~~~~~~~

• Subtask 1: 41 / 100